I really liked the puzzle "Cross Reference" (once I figured out what I had to do), and was wondering if this sort of puzzle has a name? Or was it a new invention? I would like to do more of them if I can find any!

PM me if you know so you don't give it away to people who haven't solved it yet!

edit:

Sorry I didn't realise there is a finisher's forum once I've finished! Nearly there!